WorldCat Identities

Hilborn, Ray 1947-

Works: 73 works in 178 publications in 1 language and 3,334 library holdings
Roles: Author, Thesis advisor, Editor
Publication Timeline
Most widely held works by Ray Hilborn
The ecological detective : confronting models with data by Ray Hilborn( )

27 editions published between 1997 and 2013 in English and held by 1,795 WorldCat member libraries worldwide

The modern ecologist usually works in both the field and laboratory, uses statistics and computers, and often works with ecological concepts that are model-based, if not model-driven. How do we make the field and laboratory coherent? How do we link models and data? How do we use statistics to help experimentation? How do we integrate modeling and statistics? How do we confront multiple hypotheses with data and assign degrees of belief to different hypotheses? How do we deal with time series (in which data are linked from one measurement to the next) or put multiple sources of data into one inferential framework? These are the kinds of questions asked and answered by The Ecological Detective. Ray Hilborn and Marc Mangel investigate ecological data much as a detective would investigate a crime scene by trying different hypotheses until a coherent picture emerges. The book is not a set of pat statistical procedures but rather an approach. The Ecological Detective makes liberal use of computer programming for the generation of hypotheses, exploration of data, and the comparison of different models. The authors' attitude is one of exploration, both statistical and graphical. The background required is minimal, so that students with an undergraduate course in statistics and ecology can profitably add this work to their tool-kit for solving ecological problems
Overfishing : what everyone needs to know by Ray Hilborn( Book )

14 editions published in 2012 in English and held by 843 WorldCat member libraries worldwide

Over the past twenty years considerable public attention has been focused on the decline of marine fisheries, the sustainability of world fish production, and the impacts of fishing on marine ecosystems. Many have voiced their concerns about marine conservation, as well as the sustainable and ethical consumption of fish. But are fisheries in danger of collapse? Will we soon need to find ways to replace this food system? Should we be worried that we could be fishing certain species to extinction? Can commercial fishing be carried out in a sustainable way? While overblown prognoses concerning the dire state of fisheries are plentiful, clear scientific explanations of the basic issues surrounding overfishing are less so, and there remains great confusion about the actual amount of overfishing and its ecological impact. This book provides an explanation of the broad issues associated with overfishing. Guiding readers through the scientific, political, economic, and ethical issues associated with harvesting fish from the ocean, it also provides answers to questions about which fisheries are sustainably managed and which are not. The authors address topics including historical overfishing, high seas fisheries, recreational fisheries, illegal fishing, climate and fisheries, trawling, economic and biological overfishing, and marine protected areas. In order to illustrate the effects of each of these issues, they incorporate case studies of different species of fish. Overall, the authors present a hopeful view of the future of fisheries. Most of the world's fisheries are not overfished, and many once overfished stocks are now rebuilding. In fact, we can learn from the management failures and successes to ensure that fisheries are sustainable and contribute to national wealth and food security. This book presents the "big picture" of the state of oceans and the solutions to ending overfishing
Quantitative fisheries stock assessment : choice, dynamics, and uncertainty by Ray Hilborn( Book )

24 editions published between 1991 and 2015 in English and held by 323 WorldCat member libraries worldwide

Review of survey, commercial fishery and tagging data for sablefish (Anoplopoma fimbria) in British Columbia (Supplement to the November 2001 sablefish stock assessment). = Examen des données de relevé, de marquage et de pêche commerciale de la morue charbonnière (Anoplopoma fimbria) en Colombie-Britannique (supplément à l'évaluation du stock de morue charbonnière de novembre 2001) by A. R Kronlund( )

6 editions published in 2002 in English and held by 55 WorldCat member libraries worldwide

This paper was prepared as a supplement to the most recent assessment of sablefish off British Columbia in order to accommodate new survey information and to help evaluate whether the current assessment of sablefish stock status should be revised. Data sources used for analyses in the paper include fishery-independent surveys, commercial catch & effort data, tag recovery data, and sablefish catch data from a longspine thornyhead trawl survey. After a review of these sources, the paper presents an exploratory analysis of catch & effort data, a tag recovery analysis, and stock estimates & recruitment indices from other data sources. Results of this research, representing a re-interpretation of stock status, are discussed and recommendations to fishery managers are provided
Harvesting Methuselah's clam's-Is the geoduck fishery sustainable, or just apparently so? by J. M Orensanz( )

2 editions published in 2000 in English and held by 36 WorldCat member libraries worldwide

Geoducks (Panopea abrupta) are very large, long-lived bivalves with potential life-spans well beyond 100 years. Such life-spans should be expected to confer great stability to these populations. This paper re-examines information about the ecology & dynamics of geoduck populations in Washington State & British Columbia, and explores the implications for stock assessment & management. It reviews geoduck biology & the fishing process, identifies strengths & shortcomings of two management systems, and highlights urgently-needed information. Analyses are presented to show long-term recruitment trends over a large spatial scale and to compare recent recruitment with that during the 1930's. Recommendations are provided regarding the most urgently needed research
Sablefish stock assessment for 2000 and recommended yield options for 2001 by Vivian Haist( )

1 edition published in 2000 in English and held by 34 WorldCat member libraries worldwide

This document represents a major assessment for B.C. sablefish. The document is comprised of five sections, the first of which summarizes fishery and biological information. The next three sections describe three alternative methods that are used to estimate B.C. sablefish abundance. All three methods utilize tag release and recapture data, which has been the primary indicator of sablefish abundance trends since the 1995 assessment. Prior to that time commercial catch per unit effort (CPUE) was used as a tuning index, but concern that CPUE did not reflect true abundance trends led to the development of assessment methods based on the tag-recapture data. The final section of the document presents results of stock projections
Sablefish stock assessment for 2001 and advice to managers for 2002 by Vivian Haist( )

3 editions published between 2000 and 2001 in English and held by 34 WorldCat member libraries worldwide

This document summarizes the British Columbia sablefish fishery, fisheries management initiatives, and biological characteristics of sablefish as determined during annual surveys (weight, length, juvenile abundance). It then discusses a number of issues arising from the sablefish tagging program initiated in 1977 for the primary purpose of stock identification, including: tag recoveries from the 2000 survey; sablefish movement to Alaska; and recovery rates from coded tag releases. Tag returns are used to estimate stock size & exploitation rate. Finally, results of simulations to determine appropriate sablefish harvest rates are presented along with advice to fishery managers on sablefish stock status & appropriate harvest levels
Movements of juvenile halibut in IPHC regulatory areas 2 and 3 by Ray Hilborn( Book )

4 editions published in 1995 in English and held by 33 WorldCat member libraries worldwide

In 1980 and 1981, more than 68,000 juvenile halibut were tagged in the Gulf of Alaska and Southeast Alaska in an effort to obtain estimates of movements of juvenile halibut. In this paper we develop a maximum likelihood method for estimating the movement between International Pacific Halibut Commission (IPHC) regulatory Areas 3B, 3A, 2C, 2B and 2A. In addition to the movement rates, we also estimate the sizespecific natural mortality, tagging mortality and size selectivity for commercial gear in Areas 3B and 3A. We found that all of these parameters could be estimated with low confounding, and that the predicted recovery pattern of tags conforms closely to the observed recoveries. The best fitting model estimates that there are substantial southerly movements of juvenile halibut; for example, we estimate that 17% of fish tagged in 3B would recruit as adults to 2B, and that 25% of fish tagged in 3A would recruit as adults to 2B. Further improvements in the analysis could include smaller spatial scale of analysis, and combining tagging analysis with catch-at-age data
Analysis of historic data for juvenile and adult salmonid production : phase I, final report( Book )

3 editions published between 1992 and 1993 in English and held by 16 WorldCat member libraries worldwide

Survival of hatchery reared Columbia River chinook (Oncorhynchus tshawytscha) salmon from release to return is highly variable and thought to be related to river flow during juvenile outmigration in the spring. The purpose of this project is to examine the relationship between survival of coded-wire-tagged (CWT) Columbia River salmonids and in-river flow and other freshwater factors. This report covers Phase 1, in which two methods to estimate survival were developed and evaluated, and criteria for data selection were established
Development of a simulation model of mallard duck populations by Canadian Wildlife Service( Book )

3 editions published in 1974 in English and held by 13 WorldCat member libraries worldwide

Describes an attempt to develop a comprehensive computer model of North American mallard (Anas platyrhynchus) populations. The model considers major population processes and spatial distribution patterns in an attempt to predict long-term population trends. It focuses on population biology and habitat, with those human factors that affect mallard populations being treated as driving variables. The model also takes account of the sex-age class structure of the mallard population, insofar as this relates to breeding, migration, and vulnerability to hunting. The first section of this report reviews some basic principles of simulation, including notation and symbolism, model components, variables and their relationships, the data used, and where models can go wrong. The second section describes the model and the third evaluates and discusses the usefulness of the model
Impact of redd loss at Vernita Bar on Hanford Reach chinook salmon production : final report by Donald E Rogers( Book )

2 editions published in 1988 in English and held by 11 WorldCat member libraries worldwide

This report describes the effect on chinook salmon production within the Hanford Reach of redd loss at Vernita Bar. The current target escapement of 40,000 chinook past McNary dam has no real biological justification because the wrong data were used in the analysis and the methods used are now known to be very unreliable for the type of data available. The escapement that maximizes MSY may be lower than 40,000, or much higher, and reliable estimates of optimum escapement are unlikely to be available for several more years. If the optimum escapement is truly 40,000 (or less), then loss of a few hundred redds on Vernita Bar would have no detrimental, and possibly beneficial consequences on total chinook production from the Hanford Reach, so long as escapements are in excess of 40,000. If the optimal escapement is actually much higher (60,000+), the biological cost of redd loss when escapements are in excess of 40,000 would be about two fish in the adult return for every redd lost. So long as escapements exceed 40,000, the issue of redd loss at Vernita Bar is simply a question of losing a few dozen or hundred adult fish in the next brood and is not an issue of stock conservation. 12 refs., 6 figs., 12 tabs
Chignik lakes research : investigations of salmon populations, hydrology, and limnology of the Chignik lakes, Alaska by Gregory T Ruggerone( Book )

2 editions published between 2000 and 2001 in English and held by 9 WorldCat member libraries worldwide

Strait of Georgia chinook and coho fishery by A. W Argue( Book )

2 editions published in 1983 in English and held by 9 WorldCat member libraries worldwide

La peche des saumons chinook (Oncorhynchus tshawytscha) et coho(O. kisutch) dans le detroit de Georgie, entre l'ile Vancouver et la terre ferme de la Columbie-Britannique, constitue une ressource de valeur pour le sport et le commerce. Nous avons mis au point un modele de simulation par ordinateur dans le but d'evaluer une reglementation projetee affectant pecheurs sportifs et commerciaux (saisons closes, limites de taille, limites au panier, etc.) Dans ce modele, on maintient pour chaque classe d'age les stocks naturels et revalorises de saumons chinook et coho, et on evalue les divers reglements en simulant le cycle biologique de ces poisson a intervalles de deux semaines. Les cohortes sont introduites dans le modele au stade de smolts et sont suivies dans leur mortalite naturelle, emigration hors du detroit de Georgie, mortalite par peche, mortalite par manipulation, maturation et ponte. Toute reglementation visant a reduire les prises d'un groupe d'utilisateurs a pour effet principal d'augmenter celles des autres. Tout effort en vue de permettre a un plus grande nombre de saumons d'echapper a la capture et de se reproduire est voue a un echec certain si la reglementation ne s'applique pas simultanement a plusieurs utilisateurs, et meme une reglementation severe ne pourra doubler l'echappement critique des saumons chinook. Finalement, on constate que la revalorisation des stocks de ces deux especes accelerera le declin des stocks naturels a moins que ne soit adoptee une reglementation capable de reduire les taux globaux d'exploitation de ces stocks
The 1999 FRI preseason forecast of the Bristol Bay sockeye run using an alternative approach : annual report to Bristol Bay processors( )

2 editions published in 1998 in English and held by 8 WorldCat member libraries worldwide

Forecast of the 2000 run of sockeye salmon to Bristol Bay : annual report to Bristol Bay processors( Book )

2 editions published in 1999 in English and held by 6 WorldCat member libraries worldwide

A Bayesian version of the NIWA two-stock hoki model by Vivian Haist( Book )

2 editions published in 2001 in English and held by 6 WorldCat member libraries worldwide

Expected changes in stock recruitment parameters when exploiting mixed stocks of salmon by Ray Hilborn( Book )

5 editions published in 1975 in English and held by 6 WorldCat member libraries worldwide

Optimal exploitation of multiple stocks by a common fishery : a new methodology by Ray Hilborn( Book )

5 editions published in 1975 in English and held by 6 WorldCat member libraries worldwide

Forecast of the 2001 run of sockeye salmon to Bristol Bay : annual report to Bristol Bay processors by Donald E Rogers( Book )

2 editions published in 2000 in English and held by 5 WorldCat member libraries worldwide

Washington Sea Grant project completion summary report : spatial dynamics, recruitment trends and sustainability of Puget Sound geoducks by Ray Hilborn( )

1 edition published in 2009 in English and held by 5 WorldCat member libraries worldwide

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  Kids General Special  
Audience level: 0.31 (from 0.22 for The ecolog ... to 0.85 for Forecast o ...)

The ecological detective : confronting models with data
Quantitative fisheries stock assessment : choice, dynamics, and uncertainty
Alternative Names
Hilborn, R. 1947-

Hilborn, R. (Ray), 1947-

Hilborn, Ray.

Hilborn Raymond

Hilborn, Raymond 1947-

Hilborn, Raymond William 1947-

Hilburn, R. 1947-

Hilburn, R. (Ray), 1947-

Ray Hilborn ahli biologi asal Amerika Serikat

Ray Hilborn Canadian biologist

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English (112)